Control of tunable, quasi-monoenergetic electron beams from laser-plasma accelerators and their application for compact, narrow bandwidth Thomson photon sources

ORAL

Abstract

We demonstrate precise control of a laser-plasma accelerator (LPA) using a shock-induced density down-ramp injector. Experiments systematically varied the shock injector profile, including the shock angle, up-ramp width, and acceleration length. These results establish that, by adjusting shock position, up-ramp, and angle, beam energy, energy spread, and pointing can be controlled. As a result, e-beam were highly tunable from 30 to 300 MeV with <10% energy spread, 1.5 mrad divergence and 0.35 mrad pointing fluctuation. Particle-in-cell (PIC) simulation characterized how variations in the shock profile impacted the injection process. This highly controllable LPA represents a suitable and compact beam source for the MeV Thomson photon experiments now being started on a newly constructed one hundred TW laser system. Set-up and initial experiments using this system will be presented.

–

Presenters

  • H. -E. Tsai

    Lawrence Berkeley Natl Lab, LBNL

Authors

  • H. -E. Tsai

    Lawrence Berkeley Natl Lab, LBNL

  • Cameron Guy Robinson Geddes

    Lawrence Berkeley National Lab, Lawrence Berkeley Natl Lab, LBNL

  • T. M Ostermayr

    Lawrence Berkeley Natl Lab, LBNL

  • G. G Otero

    U.C. Berkeley, Lawrence Berkeley Natl Lab, UC Berkeley, LBNL, UC Berkeley

  • T. Larrieu

    University of Paris-Sud, Lawrence Berkeley Natl Lab, University of Paris-Sud

  • Jeroen van Tilborg

    Lawrence Berkeley National Laboratory, USA, Lawrence Berkeley Natl Lab, LBNL

  • S. K. Barber

    LBNL

  • Fumika Isono

    Lawrence Berkeley Natl Lab, LBNL, UC Berkeley, Lawrence Berkeley Natl Lab, Univ of California - Berkeley

  • R. Lehe

    Lawrence Berkeley Natl Lab, LBNL

  • Anthony J Gonsalves

    Lawrence Berkeley Natl Lab, Lawrence Berkeley National Laboratory, USA, LBNL

  • Kei Nakamura

    Lawrence Berkeley Natl Lab, LBNL

  • Csaba Toth

    Lawrence Berkeley Natl Lab, LBNL, LBNL

  • Carl B Schroeder

    Lawrence Berkeley Natl Lab, LBNL

  • Eric Esarey

    Lawrence Berkeley Natl Lab, LBNL

  • Wim Pieter Leemans

    Lawrence Berkeley Natl Lab, Lawrence Berkeley National Laboratory, USA, Lawrence Berkeley Natl Lab, U.C. Berkeley, Lawrence Berkeley Natl Lab, Univ of California - Berkeley, LBNL, UC Berkeley